Automobile speed control device



y 1935. B. H. MOSSINGHOFF 2,008,149

AUTOMOBILE SPEED CONTROL DEVICE Filed Dec. 4, 1950 5 Sheets-Sheet 1 III A l2- I Mia-[i] MIME?) July 16, 1935. B. H. MOSSlNGHOFF AUTOMOBILE SPEED CONTROL DEVICE Filed Dec. 4, 1930 5 Sheets-Sheet 2 July 16, 1935. a. H. MOSSINGHOFF AUTOMOBILE SPEED CONTROL DEVICE Filed D80. 4, 1930 5 Sheets-Sheet 4 July 16, 1935. B. H. MOSSINGHOFF AUTOMOBILE SPEED CONTROL DEVICE Filed DeC- 1 5 Sheets-Sheet 5 Patented July 16, 1935 Bernard n. Mossinghoif, Chicago, Ill., mimito Progressive Motor Devices Co p ration, Ohicago, 111,, a corporation of Illinois 1 Application December 4, 1930, sem umsoomzc -91 Claims.

My invention relates to improvementsin transmission control devices for self-propelled vehicles and more particularly to a power-actuated, foot controlled'mechanism for operatively and selectivelyengaging and disengaging the transmission elements. Reference is made to my co-pending application, Serial Number 1,601, flied January 10, 1925, for speed change devices. I

One of the main objects of my invention issto radically simplify the operation of the automobile from the standpoint of the driver by provid-.

ing improved means for reducing the conventiona1 speedchanging operation to a single, readil performable by the driver movement. w

Another object of my invention'is to provide an improved power operable pedaily controllable speed change'device for automobiles capable of etfectlng any, out of a plurality of" available speed changes, in response to a selective placement of the driver's foot upon the control pedal and a single uniform depression of the same.

Another object of my inventionis to provide an improved, power actuated speed ratio change device for automobiles operable in conjunction with and through the instrumentality'of the clutch pedal in a manner to require only theconventional clutch operational movemeni/ on the side of the driver for all forwardspeed's. thus leaving the latters hands free for steering purposes and "clearing the floor board of cumbersome levers; while at the same time providing special hand operable means for reverse speed for thepurpose of reducing the danger of inadvertently meshing the gearsfor reverse.

Another object of my invention is to provide a power operable primarily pedaliy controllable speed ratio change device for automobiles in which the power is applied to effect a ratio change at the return stroke of the control pedal.

Another object of'my invention is to provide means in a pedally controllable power actuated speed change device for transiently applying the power to eflect a speed change at the very beginning of the return stroke of the control pedal, and

the actuation of the speed change eifectingmembers of said device.' a

. Another object .is to provide means in a poweractuated pedally controlled gear shift mechanism 50 for, neutralizing the gears on the forward stroke of the pedal, and for effectively. applying the power to shift the gears into engagement on the rearward stroke of thepedal, thereby introducing a synchronizing pause between the two operations;

Another object is to provide improved unifor confining the application of the power solely to directionally energizable power means for performing the speed ratio changes in an automobile, and for utilizing the engine generated vacuum for the purpose.

Another object is to provide means in an auto- 5 mobile gear-shiftingdevice which both coordinate the clutch operation with the gear shift operations, and prevent the former operation until the gears are either fully meshed or fully neutralized.

A further object is to provide emergency operative means in connection with a power actuated speed change device, through which the driver can change the speed as desired by muscular power, should the power means fail.

A further object is to provide an improved selective pedal in connection with a-power operable automobile speed ratio change mechanism, comprising lightLv yieldabie foot contact surfaces, each speed selection being. eifectedaccording to 20 the preponderance of pressure of the operator's foot upon either .of said surfaces.

A further object is to provide in a power actuated speed ratio change mechanism a .single member as the recipient of both the selective and the actuating operations, and .whose function it is to selectively shift the speed change effecting members. I

A still further object is to provide improved neutralizing means in a pedallycontrolled power actuated gear shift mechanism mounted to oppose the positive movement of the power means, thereby storing energy during said movement for .he neutralizing operation, said neutralizing operation being performed upon partial depression of the control pedal.

A still further object of my invention is to provide a device as hereinafter described which would accomplish the objects hereinbefore set 40 forth in the most efficient manner; a device compact and simple of construction, convenient to operate, readily assembled and installed, and

, comparatively inexpensive to manufacture.

with these and other objects in view the invention consists of certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming r a part of this-specification in which similar characters .of reference indicate corresponding parts in all views.

Fig. 1. is a vertical side view of the entire mechanism inits relation to the frame, showing also 56 Fig. 2 is an elevation with the side cover shown partly broken off, the actuating cylinder being shown in section.

, .Fig. 3 is a plan view with the top cover removed. Fig. 4 is an elevation similar to Fig. 2, and showing a section through the control valve.

Fig. 5 is asection taken on the line A-A of Fig. 3.

- Figs. 6 and '7 represent a top and a side view, respectively, of the foot plate and the control buttons.

Figs. 8 and 9 are bottom views of the main shank of the clutch pedal showing the selectively positionable register lever.

Fig. 8a is a sectional view of the register lever. Figs. 10, 11, i2, 13 and 14 are'various views and sections of the control valve illustrating its operation. V 1

' Fig. 15 is a section taken on the line'B-B of Fig. 3 and showing in section the gear shifting members including the selectively positionable driver member.

Fig. 16 is a sectional elevation of one of the shifting members and the driver member taken along the line 0-0 of Fig.8.

Fig. 17 is a fragmentary plan view view of a portion of the selector mechanism including the step lever and the guiding comb, and showing the selective positions of the register lever with regard to these members. 1

Fig. 18a is a fragmentary elevation of the selector mechanism including the step lever and the register lever cooperating with the selection tran smitting'mechanism shown diagrammatically inFigs. 18b and 18c.

Fig. 19 is a vertical section through the step lever and the supporting bracket. I h

Fig. 20 is a front view of the guiding comb.

Fig. 21, 22, 23 and 24 illustrate a modification of nism cooperating with-thegear shifting mechanism enclosed within the-casing 8, and comprisuse ingthecylinder l, the'piston I, the valve] controllingthe access of the vacuum to the cylinder:

,the'gears ll, shift'ableinm by the forks 1 and I, respectively.'secured to; and sliding with the rods H and I2. respectively. 'The i posedarms, "and", respectively,locatedindif-.

forks have integral therewithlower arcuate extensions i3 and It, respectivemdenominated shifting members and aetuable by the rocking movement of a single driver member ll selectively settable with regard to said shiftingmem bers. Through the instrumentality of an intermediatetransmitting'mechanism to be described hereinafter, the driver member I! is rocked in one direction to shift the gears into engagement by the piston .8 (positive actuation) and is rocked in the opposite direction to neutralise 3. Rod 2| pivoted at ll tothe extension arm 2a of the clutch pedal 2 serves to operate the clutch (not shown) releasing the same upon depression of the pedal, and allowing the clutch spring (not shown) to reengage the same when the pedal is released. The extension arm is of the pedal 2 terminates in a pawl lb adapted to cooperate with the slotted arm 22 of the three armed tripthe single-acting cylinder 4 whose piston I actuates the driver member to shift the gears, and tensions the neutralizing spring 20 prior to clutch re-engagement.

The piston actuated system includes the piston rod i0 having a pivotalengagement with the shifting lever 21 and causingthe sameto rock together with the shaft and the previously referred'to driver member ll slidably mounted thereon invirtue of said shaft 2! being turnable in bearings 18' and N integral with the casing.

securedononesidetothecasinglatllbythe' flathead screw SI and the nut II. and on the other side to the arm 26a integral with the piston rod- 2!, in virtue of which moimting, said spring is tensioned uponthe positive actuationof the pise ton and locked into podtion together with the The selective performance of the mem- (il will now be described with referenceto.

ber Figs. 5, 15 and i8.

Theshaftflishollowandcontainsaphmger Il'adaptedto'slideaxiallywithintbe shaft 28 as result of the selective foot operation, and to engage the driver member causing the same also to slide longitudinally and selectively upon the square portion "a of the shaft 2!. mentmeansbetweentbedrlvermember II and the plunger ll is of the pin-socketed type, the pin ll being seemed rigidly to the driver member and slidable in a circular groove ll inthe plunger II when the driver member is rocked with shaft rs, and 'sl-idable also in a longitudinal groovejl', channelled in the shaft II, when the drivermemberiscausedtoslideuponthesamefi Q V The driver member has two diametrically disfenent parallel planes. 7 The previously toshiftingmembers'il and llarelocatedin [parallel planesperpendicular tothe planes of the respective forks and are constructed to partially circumvent the shaft 28. The shifting fresultoftheslidingmpvementofthe drivermem-- -ber said arm has become located intheplane of"- saidslot. .Thesameshifting memherhasalow'erslot 42 engageable by the lower arm of 3 driver member upon the corresponding location 1.

of the same. The shifting member has likewise an upper slot as and a lower slot 44 similarly engageable by the upper-and by the lower arms of the driver member a'sresult of the selective. sliding of the latter upon the square portion 28s of the shaft 24; The construction and interrelation of parts of the driver member and the shifting members is such that only one slot can be engaged at a time, as will be readily perceived from Figs.5 and 15.

Referring to Fig. 2 in which all the movable parts are shown in neutral position, it is. evident that upon vacuum being admitted into the cyl inder 4, the piston will move inward upon its positive stroke causing the shaft 28 and the driver member I! to swing counter-clockwise; Assuming thatpreviously the latters upper arm" 38 has been brought to coincide with the upper slot 4| of the shifting member l3, (Figs.".5 and the counter-clockwise movement of the driver member will actuate the'shiiting member II, as

well as the fork 1 associated therewith to the left (Fig. .3) causing the gears to engage for third or high speed. It, on the other hand, the

lower .arm 39 of the driverimember l5 has been brought to coincide with the lower slot 42 ofthe same shifting member (13) the same positive -movement of the driver member will slide said shifting member, as well as the i'ork and the '.gears. associated therewith 'to the right-(Fig; 3),

meshing the latterfor secondspeed. In a similar manner the planar coincidence of the upperonthe lower arm of the driver member with either the upper slot." or the lower slot 44 of the :fshifting member i4 will cause said shifting member :and, the gears associated therewith to slide to the left or to. the flShHFigs. 3, 5 and 16) meshing the gears for first or for reverse speed, respectively, as;result of the same uniform pos- -itive rocking movementof the driver member il.

.In Figs. 15 and is the driver member II is shown in neutral positiomits arm 38 engaging slot 440: the shifting member i4-ior the pur-- pose of ,efleeting, upon. actuation, reverse speed.

.Positive locking means are provided to hold the entire piston actuated system in position against the action of'the neutralizing spring.-

insofar as vacuum to. actuate said system is supplied to the cylinder 4 only during the actual positive travel 0! the piston i. v

These locking means, include the pawl-like 23 or the previously referred to pedal actuated three-armed tripping lever as well as the shoulder 46 of the previously referred to shifting lever 21, against which the pawl ll'abuts at the end of the positivestrcke of the piston (Fig. 4) as result or pawl 2b of the pedal extension 2a pressing upon the extended jaw 22a of the tripping lever 25 during the return stroke of the pedal,

which, return stroke, it. has been indicated, is

coincident with the positive actuation of the piston. 1

H eutralization is brought about by pawl I I tripping the shoulder 48.01! the shifting lever 21 and permitting the neutralizing spring in to cdntract, thereby shifting the gears'and the entire piston actuated system to neutral. The above tripping operation is caused by the pedal asfol lows (Figs. 2 and 4) When the pedal 2, is inits uppermost position its pawl 2b is located outer-.'

" most as regards the slot 22b ofthe tripping 'lever 25. When the pedalis depressed'said pawl 22; slides'into said slot 22b and by pressing upon its upper law He turns-the :tripping lever 2| ';clockwise until the pawl 23 releases the shoulder 48 of the shifting'lever. thereby eflecting'neutrali zation (Fig.2). The latteroccurs at about clutch release.

two-thirds of the pedal Neutral locking meansjare provided, although throw immediately upon,

not absolutely necessary, and include the shoulder 41 of the shifting lever behind which pawl 23 of the tripping lever drops if at twothirds oi the stroke, just after neutralization, the driver releases the pedal. The linkage effecting this includes the pawl lb of the pedal pressing upon.

the extended law 221; of the tripping lever and turning the latter counter-clockwise (Fig. 2) as result of the pedal being lifted by the clutch spring. v

The 3-way valve (6) communicating with the engine'manifold by means or pipe 48 and with thecylinder by means of pipe 49 has an inlet port il,'an outlet port 52, an exhaust port 53 and a core "rotatable by the arms I4 and 54 securely mounted thereon. The core is held in its normal position which is that of free comthe system is neutralized as hereinbefore set forth, and the shifting lever 211 while swinging clockwise on its neutralizing movement lifts the plunger "by means of its arm 59 (Figs. 2and 4) whereby causing the valve arm 55 to close the exhaust port It (Fig. 13). .Upon iurther'depression of the thethird arm 24 of the tripping lever 25 wipes the overhanging valve trip lever b1 without affecting the valve (Fig. 10). Upon the return movement of the pedal, however, and preferably at the beginning of the same, said arm- 24 engages saidtripping lever I1 thereby rotating the core of the valve to open the inlet port and admit vacuum-into the cylinder (Figs. 10, 11 and 12). The interval during which-the inlet port remains open is only a brief one, suilicient to cause the positive actuation of the piston insofar asthe contour and.

the relative movement oi" the. valve trip lever I! are such -as'to permit the latter upon continued return movement of the pedal to escape its engagement with the'arm 24 of the tripping lever allowing the spring 56 to close the inlet port andopen the exhaust port (Figs. 10 and 4).

This occurs" after the gears Had been locked into position, as hereinbeiore set forth, and prior to the impending clutch re-engagement.

' Safety locking means operating to prevent denand 41. It is evident that while the ge'ars are being shifted the paw'l23 of tliestripping levrfl .is compelled to ride upon said periphery thus keeping. arm 24 of the. tripping 'lever to the right of (Figs.- 2 and 4), and in func- (.A) the closing of the inlet port'and (B) clutch re-engagement unless the gears are fully meshedlocked into position, are provided and in clude in the ilrst'plaee the arcuate vperiphery 44a of the shifting lever 21 between the shoultionai engagementwiththe valve trip lever 51.

This continues until pawl 23 dropsbehind the shoulder 4| to lock the gears into position causing said arm 24 to swing counter-clockwise and permit theescape o! thevalve 'triplever 51 to close the inlet port. i r I r V :It is evident also that while pawl "is riding upon periphery 48a'and untilit drops either beshoulder ,which is equivalent-to a full meshing ofthe'gears, for until it reaches behind quently the clutch cannot be reengaged' until the gears are fully meshed.

The selector mechanism by means of which the driver member I5 is selectively positionable .upon shaft 28 to selectively mesh the gears, as

hereinbefore set forth, includes the centralfoot rest Eli integral with the pedal 2 and two further foot contact buttons 6i and 62, each of said foot 5 contacts and said foot rest being marked re-.

spectively (I), (2), and (3) to signify the various speeds obtainable through their respective:

operation. The two buttons GI and G2 are integral with the button lever 63 co-extensive with the upper arm of the pedal lever 2 and offset with regard to the center line between the twobuttons in which center line all three of these integral membersare pivoted to the pedal lever 2 at 64 (Figs. land 7) so that a preponderant pressure upon either 6| or 62 button will cause the lower end of the button lever 63 to swing to one side or to the other; A second oscillating lever'65 denominated the "register lever is pivoted to the main shank of the pedal lever at 66 and has its free end linked with the free end of the button lever 63 by means of the collar 61 and the anti-rattling spring 68 in a manner to permit both of these levers to swing together about their respective pivoting points as result of said preponderant foot pressure upon either button or G2. Normally the above oscillating lever system iskept in a central position in line with the pedal lever by the tensioned centering springs 69 secured to the. main shank of the pedal and adapted to oppose the deviation of the oscillating levers from the planeof the pedal lever 2. Y t p The register lever 65 has on its lower side two projections II and12 whose function it is to fall in selectively with the various steps of the step lever 10 located below the pedal and in the .line oi its movement.

. Said step lever 10 is supported by and is turnable upon the pivot pin. 13, the latter being'in turn secured to the bracket 9| rigidly moimted on the frame. The periphery of step lever i0 is in the form 01' a partial cylindrical surface indented in the form of steps, of which there are five, namely; I4, 15, 16, I1 and I8, respectively.(Figs.'18a, 17 and 19). 01 1 1 3 "and Il are cooperative, being diametrically disposed and located directly in the plane or the pedal lever. Steps 'll and, 18 are likewise cooperative .and diametrically disposed withregard to' the axis 01' rotation of the step lever,-being furthermore located to one side of the vertical plane oi the pedal lever. Step." located to the other side of said plane has no companion step on the op-: posite side 01' the axis of rotation, for the 'purpose as will appear later. Steps II and 11. lo-

cated on the same side oi. the step lever bearing are .iurthermore adapted to cooperate with the upper projection H o! the register lever when the pedal is depressed; and steps 14, II and I2 cooperate in a similar manner with the lower projection i2- 01 the same.i

It having been indicated that the lever i5 is oscillablethrough .foot operation to either side oithe pedal lever plane, thereby causing its projections to fall in selectively with the corresponding steps 01! the step lever II, it is evidiit that uponthe depression 0! the pedal .said step lever III will be rotated through a dc!- inite angle depending upon which 0! its five steps coincides first with the respective projection of the register lever 65. It is evident also that said rotation will come to a stop, and the step lever will be definitely positioned when both, the pedal movement and the rotation of the'step lever caused by the same, are arrested. The first 0! these comes to a halt when the rubber cushionedstop 65a located on the register lever 65 midway between the two projections 'II and 12 comes up against the bearing 8| oi the step lever 10. The second, namely, therotation oi the step lever, isllikewise' simultaneously arrested in virtue of the fact that the step cooperating with the one which has been depressed first by. the respective projection of the register lever simultaneously comes up'against the other projection oi. the register lever on the opposite side of the axis of rotation of the step lever, thus positively and selectively positioning said step lever at the end of the downward pedal stroke.

When said positioning of the step lever is eifected through the instrumentality of step II, which, as has been indicated,fhas no'companim step, a special stopping arrangement is provided which will be subsequently described.

In virtueof the pivoting arrangement described the two contact buttons SI and 62 are lightly yieldable with regard to the loot rest 60, the yielding movement causing as above set forth, the selective oscillation ot'thebutton' lever II and the selective positioning of the register lever 65. associated therewith upon the step lever I0. In virtueoi the design of the respective. levers and the location or their pivoting points, the actual yielding movement of each of the contact buttons BI and 62 is of the nature of approximately ior each selective positioning of register lever 65:

It has been stated that normally the-oscillating lever system is kept in a central position in line with the pedal lever by the previously reterred to centering'springs 68. These cooperate with the Iourpronged guiding comb-9B to make the selection definite and infallible; said guiding 'comb having three slots ilil, I02 and "I2 corp dal, a plunger 96, mounted inside the step lever driver member l5 and sliding within the shaft 28 to position said driver member selectively.

The other" three include the rod 00 having onev 01 its ends linked with the arm 19 integral with the step lever 10 and radially projecting therefrom; the dink 81a pivotally connected to the other end of said rod ll; and the rectangular N lever 82, to the vertical shank "a of which said link 8| a is bolted, said shank being rotatable in, and supported by the bearing 83 integral with the casing 3 (Fig. 2). The horizontal arm 82b of lever 82 on the other hand, engages a slot ll 01' the previously referred to plunger 30, said slot engagement being sufliciently loose to permita slight amount of sliding, thereby making possible the conversion of the rotational movement of the horizontal arm of lever 82 into the selective sliding movement of plunger". 1 a

Theioot contact buttons GI and! are shown as located each in-a somewhat higher and inclined plane with rega'rdto .the central foot rest 60, although this isnot a necessary condition and without any loss in efllciency the three contact surfaces could be located in the same plane, or the buttons BI and 62 mighthave been positioned even below said central foot, rest 80.

The speed-selective operation -Assuming now that regardless of the previous positioning oi! the selecting mechanism, the operator wishes to accomplish second speed, he

places his iootupon the central iootrest 60,

.come up against the other projection I! of the register lever, or, dependingupon the previous positioning of the step lever Ill, it may be that projection 12 will first contact with step I! and turn the step lever until the other projection 1| has come up against step". In either case, the

rlnalpositioning-oi step lever 10 will be that for second speed, whichthrough the previously described linkage will be directly transmitted to the driver member i to position the same also for second speed as previously set forth.

uIf now theoperator wishes to accomplish third speed, he places his foot tothe upper right-. so that it covers the button 62 marked (3) and depresses the pedal. If he so wishes he may slightly tilt his foot so as to accentuate the pressure upon button 62; This, however, is not absolutely necessary, since button 62 being lightly yieldable, the mere placement of the foot .over I the same and the normal depression of the pedal will cause said button to yield thenecessary for the selective positioning of the register lever "proximately and swing levers 63 and 65 to the right where the projection I2 oi. lever 35 :will come to face step ll of step lever II. Upon thedepression oi the pedal, said projection will impinge upon said step and cause the rotationoi' the step lever. It having been indicated that-in this case step 14 has no-companion step to mark the end of thepositioning movement of the step lever, said movement is in this case brought to a halt by the plunger ll mounted upon the bracket II and held by a spring 92 in a position to oppose the further rotation of the step lever, by pressing upon the extended step ll, thereby positioning the step lever and the entire selective mechanism for first speed. 4

In order to position the step lever and the dependent selective mechanism for reverse speed, thei'ormer mustbe rotated against the action oi the plunger ll and spring 92. This cannot be done by the foot on account 01' the bearing 81 or-the step leverll arresting the further movement of the pedal, but it must be done by the hand. The reason for designing the selective mechanism so that it requires an additional hand operation for reverse is to safeguard the operator against inadvertently meshing the gears for reverse while thevehicle is moving forward, with the consequent disastrous results for the transmission mechanis'm; and a further reason is the respective simplification oi'the pedal resulting from the limitation of the number of the pedal buttons to two. i The hand operative means for reverse comprise the arm 83 rigidly mounted upon, or integral with bearing Bl or the step lever and operable to rotate the same through a pull rod 84 linked to said arm and held coextensive with the steering column S by a ring R handle 05 to its uppermost position which rotates the step lever against the action oi. the spring 92 and positions the entire selective mechanism for reverse. The reason why first speed must be selected prior to the operation for reverse is that step 14 0! the step lever 10 operative for first has no companion step on the opposite side of the bearing to prevent the further rotation of the step lever as required for reverse.

Upon handle 95 being released the selective mechanism automatically, through the action of the above referred to spring 92, reverts to first.

, In accordance withthe previous explanation or the operation of the neutralizing spring 20 and the respective locking means, neutral is,accomplished in a twofold manner: j n

A. Neutral is selected by the operator depressing the pedal two-thirds of the normal stroke during which time the clutch is disengaged and at the'end of which period the operator feels a slight increase in the pedal resistance. indicating that the pedal pawl ID has slipped into the slot 22b '0! the tripping lever and is operating to release,

the neutralizing spring 10, which release requires only approximately further pedal depression, after which, it the pedal is released, the gears remain in neutral and the clutch is 'reengaged, and

B. The gears are regularly neutralized upon the downward stroke of the pedal and reengaged again upon the rearward stroke as a part of the gear shitting operation without any conscious effort on thelpart of the operator.

The various positioning of the selector mecha- The combined operation of the device is: as i'ollowsz. The operator having decided upon the desired speed places his foot accordingly'and depresses the pedal. The'first two-thirds oi the downward stroke operates to release the clutch. Upon continued depression of the pawl 2b integral with the pedal lever enters the slot 12b of 5 the tripping lever and begins to turn the same to release the neutralizing spring 24. This latter operation is accomplished upon further '(approximately) movement 0! the pedal. In the course or the neutralising movement oi the sys- 10 tem the am ll of the shifting lever lifts the plunger 48 to'close" the exhaustport I of the valve. During the turther downward movement of the pedal (last third of the stroke) the arm 24 o! the tripping lever 2 passes behind the pendant valve trip lever 11, while at the same time the pedal actuated register lever ll selectively sets the up lever II, and consequently also the driver member "into position. withgthe beginning of the rearward stroke of the pedal, which is now actuated solely by the clutch spring, the arm 24 of the trippins lever engages the pendant trip lever ll of the valve and opens the inlet port which, as hereinbetore set forth, operates'to shift the gears into position. in the firstthird oftherearward stroke of the'pedal. At this time the positive piston strokebeing completed, the pawl 23 of the tripping lever 24 slips behind the shoulder l. of the shifting leverv tolock the system into'iunctiongl engagement, permitting thereby the valve tripping lever II to escape and close the inlet port opening the exhaust port. The remaining two clutohre-ensasement v It having that are 'thirdsoftherearwardstrokeareoecupiedbythe 'neutralisedonthedowhwardsu'okeo! thepedal Positive selection is am of the selector mechanisminvirtueorth'e'iactthatentireselective operation, whether performed by the toot or bythehand (tor reverse) isdirectlyandsimultaneousiy transmitted to the driver member ll asthefinalselectiveagent.

Emergency means are provided for the pin'pose oishittingthegearsbybandin thecaseoipower failure. 'I'heee include the arm ill integr l with the shitting lever 21 and rotatable by the plunger I" normally kept in inoperative position bythe spring I. The plunger I" is pushed against the arm I" 'to'rotate the shifting lever H for gear engagement by the bell-crank lever Ill, which in turn is actuated by'the operatorpulling the conveniently located handle III of the rod r Ill pivoted to said bell crank lever Ill (Figs. 1 and 2). It is evident thatthe pressure 0! the plunge'r in against the arm m is similar to the plstm-pressure as tar as the final result is concerned. It is evidmt also thatin order to shift the gears by the emergency leverage, the 70 respective gear must be first selected by the'i'oot the pedal must be first selec y y depressed.

Amory in a similar manner as for power g."

- I mentoftherespectivegeardoes the piston-actuated atjtbe end or its positive stroke with a view of smooth and quiet meshing of the gears, an auxiliary, so-called cushioning, valve In is shown associated with the cylinder 4 and operable by the piston I (Figs.

2 and 4). 7 It comprises an air chamber l2l coml municating with the control valve 8 and serving to admit'vacuum tothe cylinder through a central orifice ii! in the cylinder head closable b7 the plunger type of core I" having splined ports I24 (Figs. 4 and 25) between the short radial 1. ribs lilo. The spring III located inside thecore and causing the same to'proiect into the cylinder until flange I28 0! the core abuts against flange I21 ot the body of the valve operates to keep said ports open with regard to vacuum ll passage to the cylinder. The ports are cloeable by the piston at the end oi the stroke as the latter presses against the core I23 and moves the same out o! the cylinder and intothe valve (Fig. 4). There is also a by-pass I28 provided I in the cylinder head which remains permanently open. Evidently when the ports I24 are closed by the piston the vacuum pressure in the cylinder is'reduced in proportion to the width of the Ilia tobe screwed in'and out .0! the orifice. A I

further function of the by-pass I2! is to compensate for eventual air leakage around the pis- Arurther cushioning arrangement for the put pose of gradually reducingLtheoperative vacuum I pressure is provided and is associated with the control valve I. It'consists in a radiallytapering' groove "a upon the straight side 54b of the core 4| cooperating with the inlet port II. "It 'isobvious that when the core is turned'to close 0 the passage of vacuum, said groove "is will remain tor a space or time after the normal closing or the valve, thus reducing thevacuum pressure in proportion to its width and contour, and contributing to a smooth meshing'ot the 0 ears. r 1 i f Prom'whathasbeenstatedas r'egardsthehand operation for reverse and the respective leverage.

it will be readily understood that for every selection the pull rod 04 coextensive with the steer- I "ing column 8 and positively linked with the step lever II, will move along said column an amount to theposition oi the step lever. Consequently an indicator finger 04a could be aimed, it desiredlrigl 1), upon said pull rod and the various positions markedupon the steering colmnn as at Bto" indicate the respective Pwmwhathasbeenstatedoltheoperatioii 'ot the piston actuated system. it is'evidcnt that Q a and a oi the driver member-il,. jrm difierent width providing for lost motion of arms within saidslots when the slidingmoveentire driver-member strobe,

aspring between the-initial selection meansand i Non-positive (modified) selection In certain cases it may be desirable to interpose the ilnalselection'means sons to time the tran s mission of the operative movementbetween the two.* The desirability of suchan'arrangement arises, for instance, when, for the purpose of reducing the extent of the pedal stroke, the neutrali'zation point ,has been' relegated to the very end of the downward stroke of the pedal so that it almost coincides with the selective setting of the step lever. .In such a case it may happen that the pedal actuated register lever comes up against fmannerasthe steplever I" andhas an arm Ill the step lever before the gears have been neutralized. In the'device as described this wouldresult in-the pedal movement becoming before completing the selection because the step lever cannot rotate until thedriver member has been shifted "to neutral on account of: the non: engaged arm of said member being locked by the body of the adjacent shifting member. In order to permit in this case the further movement of the pedal necessary for the neutralization ofthe gears and the completion of the'selection, a spring can be associated with the step lever so as toopits movementand take up the further travel of the pedal while at the same time storing energyfor the completion of the selection.

A modiiiedselectorof thistype is shown in Figs. 21,22,23 na zal, inwhich at designates the step leverproper held in a central position by the yieldable fork l 8 l thelatter being pressed against the arcuate extension ll! of the step lever bearing the spring "3 contained in the cylindricalcasing I34. Baldv cylindrical casing is rotatably securedto the pin I" in a similar to which is linked the rod. I31 identical with rod of'the preferred embodiment andserving to .link the primary selection means associated with the pedal with the secondary selectionmeans within the casing 3.

It is evident that in: case the step lever positioning is transmitted to the driver member onlyafter the spring III has been sufflciently compressed-as result of the turning movement of the stepslever and the pressure of its extension; is: upon theforh III, toswing casing flu and shift said rod I31. It is evident also that'should the casing Ill remainrigidbecause the driver member has not yet been shifted to neutr'aL- the pedal will continue to move together withthe step lever compressing the spring lll whose energy will be released to position the driver member as soon as the latter has ibeenneutralisedlin virtue of said further movement oi the pedal.

'Itis evident from the foregoing that a scar shifting device such as described eoum be'readily imade \operabl'e'with compressed air or with anyother-type offluid pressure means; andrthat its tial features could be-adaptedandmade operable with any other type of power without.

departing from the spirit of my invention.

- It is evident also that tbeiroles ofthe cations said device could be readily adapted to operate a four-speedtransmisslon system.

It being further understood that other changes and modifications could be made without departing from-the spirit of my invention, I, therefore, do not wish to be limited by the particular structure descr be but aimto cover all such modifications as come within the scope of the appended claims. a

ev t claim is: l '1. In a motor vehicle in combination with a variable speed transmission system a power actuated device for controlling the operation of said system including a combined selecting and operation directing mechanism unidirectionally actuable by the operator and self-suflicient'for effecting either out of a plurality of speed selections by a single reciprocable actuation of said mechanism, andmeans whereby the prior speed isdisengaged upon actuation of said mechanism in one direction and a new speed ratio efl'ected upon its actuation in the other direction.

described my invention, what cylinder and piston type, a propeller shaft revolvable by said pistons, a'second shaft revolvable by said first shaft for a plurality of driving relations through the agency'of selectively engageable transmission elements, and means including a further single cylinder and piston unit ener- 2. In a motor vehicle a prime mover of the,

gized bysaid prime mover forrselectively engaging said transmission elements in response solely to selective footoperation of a single controlling lever.

3. A fluidpower actuable ratio change device including diversely operable ratio change effecting members, a pedally directed selector mechanism to determine the desired operation of said members, and a single cylinder-to actuate said members selectively through theiinstrumentality of a single controller. t I 4. A device as claimed in the preceding claim operated through'the instnimentality of the clutch pedal and positively actuated upon the return V tionally energizable power unit operating through said last means I to effect selectively said driving relations.

t 6. In a motor vehicle injcombination with a v Iclutch pedal of a mechanism for selectively shifting a plurality of 'transmissionelements in and "out of engagement, a unidirectionally energizable power actuator to perform the shifting operation through the instrumentality of selectively settable intermediate means and means associated with said pedal to perform the selective setting ration with theclutch operation.

' 'I. In adevice as claimed in the preceding claim said clutch operation being performed at the be ginning of the forward stroke and at the end of the rearward 'strokeand said unidirectional actuationbeing performed at the beginning of the 8. A- pedally controlled speed change devil ice including speed change eifecti'ng means, fluid power means for actuating-said first means,seleotor mqnsfordeterminingthe operation of said first means, and means for completing said determination on the forward stroke oi! the pedal and for effecting said actuation on the rearward stroke oi. the pedal.

9. A pedally operable power actuated automobile transmission control device including means for operatively selecting the desired transmission ratio on the forward throw of said pedal and means for applying said power to effect said ratio on the rearward stroke of the pedal.

10. An automobile transmission control'device in combination with a source oi. power, a reciprocally movable operator directed controller for said device, means for selecting the desired transmission ratio and for setting said mechanism in prefunctioningcondition by a single movement of said controllerjin one direction and for applying said power to completely effect said ratio by a similar movement in the oppositedirection.

11. Aspeed change device for automobiiesincluding a power actuator operating through the instrumentality oi shiitable members to effect a plurality of ratiochanges as directed by the operator throughthe agency of a selector mechanism, tensionable neutralizing means for said members opposing the positive movement of said actuator and saidfmembers and lever means for automatically locking said neutralizing means when tensioned. 1

12. A power actuatedspeed change device including a -control lever; speed change eifecting members, selectormeans for said members, neutralizing means for the same, and means for applying said power to positively operate said members according to previous selection and pre-Iunctionally operate said neutralizing means, all 012 said means being operable in the course of a a single reciprocal stroke of said control lever,

13. vIna power operable device to control selectively the speed of a motor vehicle, speed changing members selectively shiftable into functional engagement by a single unidirectionally energizcluding ratio change effecting means, selector means for the same tensionable neutralizing means for the same and a reciprocallymovable controller to neutralize and select said ratio change effecting means on its forward stroke and to causeosaid power to simultaneously tension said neutralizing means and positively operate said ratio change effecting means on its rearward stroke. v a

16. A device as claimed in claim 15 including means for transiently applying said power at the beginning of the rearward stroke, and means for locking said ratio change efiecting means and said neutralizing means when iniunctional engagement and when in neutral. V

17. A selective power actuated automatic 'gear shifting device for automobiles including a'reciprocally movable controller for said device, shifting means for throwing the selected gear into engagement, power means for positively actuating the shifting means, neutralizing means for disengaging the shiitable gears and means cooperating with all of said means for causing the disengaging and the selective operations to occur when said controller is moved in one direction and the positive shifting operation when said controller is moved in the opposite direction, thereby introducing a pause between two consecutive engagements. i V, V- i i 18. In a" device as claimedv in the preceding claim, said power being identical with the engine generated vacuum pressure and said controller being mounted upon the'clutch pedal and 'co operating therewith; v a

19. In combination with a clutch pedal, a selector mechanism cooperable therewith, a speed ratio change device actuated'by fluid power as directed by said selector mechanism and further-means associated with said mechanism to cause said 110- tuation to occur on the return stroke or said pedal.

bers and an operator controlled directing and coordinatingvlever system forsaidmernbers, said actuator, and said means for causing theneutralization of said members to'occur at a partial depression of said pedal andtheir actuation at the return throwof the same. i i,

21. In a motor vehicle propelled through the agency of a gear transmission system, a device to control the operation of said system for a plurality of speeds including a fluid power actuator for switching the individual gears into engagement, as directed by a combined selector and a selection registering mechanism and means including a depressible pedal for completely operating 7 said last mechanism on'lthe' downward stroke oi the pedal and said actuator onfthe upward stroke of the same. r g 22. Ina device as claimed in thepreceding claim, said pedal being the clutchpedal and said actuator being positively energizedat the beginning of the return stroke-oi said pedal,

23. In combination with a-clutch control lever, aeratio change device iorengaging and disengaging members 'into'various ratiochanges for automobiles, including such ratio changing members actuated for ratio engagement by power means through the instrumentality of an intermediately and diversely operative directive mechanism, and means associated with said mechanism and controlled through the instrumentality of said lever to cause'said engagement actuation to occur on the return stroke of said lever,

' 24. In combination with'a pedal, a ratio change device ior automobilesfincluding ratio changing members selectively actuated by power means through the instrumentality or an intermediately operative operator controlled selective and directive mechanism, and means associated with said a clutch controlling function and said power being of the fluid pressure type effectively applicable in the first part of thereturn stroke of said pedal. r P r 25. In a motor vehicle'in combination with a .I.

source oi power a plurality of transmission elements and a speed control device including clutch pedal operable selection means, power means,

:the ciutch,;neutralizesaid transmissionelements and register a selection on the forward stroke of said pedal, and tooonsecutively and functionally re-en'gage the selected transmission elements'and re-engage the clutch on the rearward stroke or .said pedal.

.26. A device as claimed in thepreceding claim operable by engine generated pneumatic pressure, including cooperating locking means for said transmission elements and means operative, to apply said pressure solely to positively actuate said shifting means. i I I 27. A power actuated speed change device for automobiles operable for a plurality of speed selections by a single reciprocally movable operator actuated controller and including automatically operable power dispensing means, positively onerable upon the return throw of said controller.

28. In a device as claimed in-the preceding claim said controller being the clutch pedal, said power being of the pneumatic type and saidpower dispensing means being a valve operable to dis- 30. In a pedally operated ratio. change device for automobiles fluid power means for effecting the ratio changes through the instrumentality of intermediate operative meansincluding a power dispensing valve having means associated therewith to efl'ectivelyapply said power at the beginning oi the return stroke of said pedal in a predetermined gradual manner. v

31. A device for controlling the normal function of an automobile through the instrumentality of the clutch pedal including a plurality of selectively shiitable members, means associated with said pedal for transmittingthe desired selection to said members, means for eflecting said selection concurrently with the clutch operation, and locking means for preventing the clutch operating movement of said pedal until said members have been shifted to effect the selections.

32. In an automobile in, combination with a source of power a ratio: change device including a pedal selector, power means for selectively shifting the rationchange effecting meansin response to selective foot operation, means for transientlyv applying said pow'ersolely to effect said shifting operation onthe return stroke of said pedal, and means distinct from said power for automatically locking said ratio change ,effectingmeans when unidirectionalreciprocal movements of the foot operating said pedal.

34. A ratio change device for automobiles including in combination diversely operable ratio change-effecting means, a power actuator for said means and a selector mechanism to direct said actuation including a pedal having a plurality of relatively yieldable foot contact surfaces eiiective for selection determination through selective preponderant foot pressure upon either of said surfaces.

35. In an automobile a depressible pedal controller tor a power actuated speed change device having a plurality of foot contact surfaces, one of said suriaces being rigid with regard to the main body of the pedal lever, the other surfaces beinglightiy yieldable with regard to said first surface and: means for efl'ecting a speed selection in response to a preponderant pressure upon either of said surfaces.

36.,In a device as claimed in the preceding claim, said controller being the clutch pedal, said actuator being operable by fluid power and said preponderant foot pressure being of the nature of the conventional clutch operation ror every selection.

37. In an automobile, a selective speed. control device including members operable for a plurality of speed selectionsby a power actuator as directed by the operators; foot through the instrumentality of a pedal having relatively movable ior selection foot contact portions and a coordinating mechanism intermediate said pedal, said actuator and said members, said pedal being adapted to operate the clutch in the upper part of its reciprocal stroke, said actuator being operable by ,fiuid power, and said coordinating mechanism including membersselectively oscillatableby said movable footcontacts for selectively setting a selection registering mechanism associated with said members.

38. In a poweractuatedratio change device for automobiles, ratio change effecting members actuated bysaid power, foot operable primary 'selection means including selectively oscillatable means, secondary selection means associated with said ratio change effecting members and means for positively translating the proportioned oscillations of said oscillatable means into selective setting of said secondary selection means.

39. In a power actuated automobile speed control device of thetype operable through the instrumentality of a pedal selector, selection initiating means, selection completingmeans, and further means to positively transmit the foot selective operation from said selection initiating means to said completing means. i

40. A power operable transmission control device including means forv selectively throwing in and out oi. engagement the individual transmission elements through the instrumentality of a single intermediate actuating agent associated therewith according to the ,setting'oi said agent as directed by a single operator manipulated selection and; operation control.

41. In an automobile a power actuated device for, effecting a plurality, of speed ratios including ratio change effecting members, means for selectively determining the operation or said memand :said foot operation being effected through I the instrumentality oi the clutch pedal.

43. A power' actuated automobile speed control device of the type selectively operable by a foot controller including power actuated speed change effecting members, an intermediate lever system for directing said power to operate said members I fora plurality of speeds, and further specially operable by thedriver control means for directing said lever system to control at least one selection.

44. In a device as claimed in preceding claim said special controlmeans being hand operable and the selection controlled thereby being reverse speed.

45. In a device as claimed in claim 43 tensionable means for automatically restoring the reverse selection means to pre-functional state after operation. V

46. In a motor vehicle, a speed change device actuated by power means for a plurality of speed changes as directed by the operator through the instrumentality ot a foot-operable selector mechanism and further means for efl'ecting said plurality of speed changes independent of said power means. r

47. In a motor vehicle in combination with a source of power a speed change mechanism including speed change eflecting members, means for selectively directing said power to operate said members for a plurality of speed changes and further specially and directly operable means associated with said speed change eflecting members operatively equivalent to said power means.

48. In a device as claimed in the preceding claim said further means being manually operable for the entire range of speed ratio changes.

49. A device as claimed in claim 47 actuated by engine generated pneumatic pressure and selectively controlled through the instrumentality of the clutch'pedal.

50. In a motor vehicle in combination with an unidirectionally energizable source of power and clutch operating means a speed ratio change device including means for selecting a plurality of forward speeds solely by foot-operation, power operable'ratio change effecting means, and means for cooperatively combining said power operation and said clutch operation.

51. A device as claimed in the preceding claim operated by fluid power means.

52. In combination with a source of power and a normal function performing pedal a speed ratio change mechanism including power-actuated gear shifting members and an lniermediately operating directing mechanism including primary selection means associated with said pedal and secondary selection means associated with said gear shifting members.

53. In a fluid power operable ratio change device for automobiles power means for eflecting the ratio changes including members actuated by said power and automatically operable power control means for controlling the acceleration of said members.

54. In an automobile a transmission control device operable by fluid power including a cylinder and piston actuator and valve control means operable concurrently with the piston toautomatically control the rate of the application of said power to said piston. I

55. In a device as claimed in the claim said means being a valve operable by said piston in the latter part of its positive stroke.

56. In a pedally controlled power actuated ratio change device for automobiles ratio'change eifecting members, secondary selection means associated with said members and primary selection means associated with said pedal, and tensionable means operative intermediately said primary and said secondary means to control the transmission of the foot selective operationbetween said last two means. i

57. A fluid power operable pedally controllable ratio change device-for automobiles including power means for actuating ratio change eflecting members, means for causing said actuation to occur on the return stroke of said pedal and means for confining the functional application of said power only to the period necessary for actually performing said ratio changes.

58. In a motor vehicle in combination with a source of power and a pedal controller, a driving ratio change device embodying primary selection means cooperable with said controller and selectively positionable by a mere placement of the foot thereon, secondary selection means operable to register the selections upon bodily movement of said controller, and ratio change eflecting means actuable by said power according to said selections.

59. In a power operable driving ratio change device for automobiles, a pedal, initial selection a means associated with said pedal and operable by selective placementof the foot upon the same, selection registering means operable upon depression, of said pedal, tensionable energy storing means, ratio change eiiecting means and power actuable means for actuating said last means and said energy storing means.

60. A device as claimed in the preceding claim actuable to eifect the selected speed upon the return stroke of said pedal.

61. In combination with a source of power a depressible pedal, diverselyoperable ratio change efl'ecting means for accomplishing a plurality of speeds, selection initiating means cooperable with said pedal, selection registering means associated with said ratio change eifecting means, and

means for directly and positively transmitting the selection from said initiating means to said registering means upon depression oi said pedal.

62. In an automobile in combination with a source of power and a clutch pedal, a speed changing device including power actuable means for eiIectlng the speed changes, selection means, speed indicating means, and means to operate all. of said means to accomplish the selected speed by a conventional depression of said pedal. 63. In combination with a source 01" power and a reciprocally movable control lever, an automobile speed change device including clutch operating means, selection means associated with said lever, power operable speed changing means, and means for cooperatively combining said power operation and said clutch operation, causing the speed change to occur on the return stroke of said control lever. w

64. Incombination with a source-of power, an

automobile transmission control device including selectively shiftable transmission elements actuable by power means and by tensionable means,

pedally operable selection means, and means for shifting said elements in one direction by said power means and in another direction by said tensionable means.

source of power, a ratio change mechanism including ratio change members, means for applying said'power tomove said members for a plurality of ratio changes, and further-means normally accessible to and reciprocable by the driver, efl'ecting a plurality of ratio changes independently' of said power byeflectively unidirectional motion in a single plane. 66. an automobile speed change device including members operable to eflect a plurality of speed changes, fluid power means for operating said members to eflect said changes, valve means for applying said power, and further valve means for modifying the speed 0! flow of said 65. In a motor vehicle, in combination with a i power for slowing the final stage of the change effecting operation.

67. An automobile speed change device including members operable to effect a plurality of speed changes, power means for operating said members, and adjustable means for modifying the effective force of said power during a part of its operative travel.

68. An automobile ratio change device including elements operable to effect a plurality of ratio changes, fluid power means for actuating said elements to effect said changes, and valve means applying said power for said changes and having graduated port construction for graduatedly applying said power and accordingly effecting. said changes in a-graduated manner.

69. In combination with a source of fluid power and automobile clutch controlling members, a ratio changing device including ratio change members actuated by said power for positive ratio engagement, a controller constructed and positioned for foot operation controlling the disengagement of the clutch and means for cooperatively combining said clutch and ratio change operations, causing the power application to occur after the clutch has been completely disengaged.

70. In a motor vehicle in combination with a source of fluid power and a single functionally unidirectional fluid power motor, a driving change device including ratio change members actuated by said single motor positively into three or more ratio engagements, and means tensionable by said motor for actuating said members into ratio disengagement.

71. In a motor vehicle, a driving ratio change device, .fluid power means operating said device for a plurality of ratio changes, and clutch controlling means positioned and constructed for foot operation to determine ratio changes efiected by said power means.

72. In a motor vehicle, in combination with a clutch pedal, a fluid power. actuable device for controlling a normal function in said vehicle, a purely physical pressure selection means, and selector means associated with said clutch pedal, positioned and constructed for foot operation to determine the operation of said device.

73. In a motor vehicle having a clutch, a mechanism for the dual function of establishing and disestablishing a plurality of driving .relations, fluid power means operating said mechanism for one of said functions, other means of operating said mechanism for the other of said functions, a plurality of driver pressable control elements for a plurality of said driving relations, and means associating said elements with said power means and mechanism combination whereby a unidirectional pressure by the driver on a selected element self-sufficiently controls for a complete cycle of selected change from one driving relation to another.

74. In a motor vehicle, the combination of a device diversely operable for diverse effects, fluid power means operating said device, purely physical pressure setting means determining subsequent operations of said device, and of a single driver operated controller positioned and constructed for foot operation controlling a normal function of automobile operation also controlling said setting means and said device for a complete change from one of said operative effects to another.

75. In an automobile, a driving ratio change mechanism, fluid power means for operating said mechanism, a single driver operated clutch controller, means associated with said controller for determining a subsequent driving ratio, power application effecting means operable by and only during a part of the movement of said controller, the unidirectional reciprocal operation of said controller self-sumciently controlling the clutch and complete driving ratio changes, and means constructed to permit only one effective ratio determination at one time.

76. A mechanism for automobile operation including a plurality of elements reciprocally movable for a plurality of effects, direct power means adapted to move said elements in one direction, means other than said power means to move said elements in the other direction, a control pedal for a normal function of automobile control, purely physical pressure means determining the operation of said mechanism, means controllable by said pedal efiecting said operation, and means whereby the operation of said pedal self sufliciently sets said determining means.

77. In anautomobile, fluid pressure means actuable for a plurality of driving ratio changes, controlling means for the same constructed and positioned for foot operation diversely to determining any of said changes, and additional control means for an additional ratio change, operable in other manner than said foot operation.

78. In a motor vehicle a multiple driving relation change device having forward and reverse ratios, fluid power energized means actuating a plurality of changes in said device, means eifectively applying said power actuation, change determining means constructed and arranged for diiferent foot control to determine different changes, said determination being transmitted to said device, power and applying means combination through solely physical pressure communication connections, and further control means differently operable by the driver for controlling at least the change to the reverse driving ratio.

79. In a motor vehicle, a multiple driving relation change device for a plurality of forward, neutral and reverse relations, fluid power energized means actuating a plurality of changes in said device, immediate means applying said power actuation, control means positioned and constructed for foot operation determining a subsequent change and through mechanical connections with said applying means causing said power to effect said change, means preventing more than one change determination'becoming effective at a time, and additional control means differently operable by the driver for controlling at least the change to the reverse driving relation.

80. A pedal driving ratio change device for forward and reverse speeds, fluid power means to effect a plurality of ratio changes in said device, ratio determining means for said power actuated changes, associated with said device and power means combination and completely settable by the foot operation of said pedal, and differently operable driver actuated remote control means for'controlling reverse speed.

81. In an automobile, a driving ratio change mechanism having a plurality of driving ratio positions, purely physical pressure power means to effect ratio changes in said mechanism, a clutch pedal/ratio selection means associated with said'pedal and constructed and positioned for foot operation to determine particular ratio selections, and means preventing a change of selection when the pedal is in ratio change effecting position.

82. In an automobile, a driving ratio change device, purely physical pressure power means operating said device, a single foot operable con troller, means associated with said controller for determining a desired ratio, means to control a complete change cycle from oneratio to another solely by movement of said single controller, and means to effect neutral position by partial throw of said controller. t

83. In a motor vehicle, the combination of a power operated ratio change mechanism, of footoperable change determining means, of a remote visual ratio indicator automatically operable by said means and mechanism combination and of connections between said indicator and mechanism whereby the ratios of low intermediate and high speeds are indicated in their natural consecutive order of juxtaposition.

84. In a motor vehicle, a multiple driving relation change device for positive ratios and neutral driving relations, fluid power energized means effecting a plurality of changes in said device, immediate means applying said power actuation for said changes, and control means positioned and constructed for selective foot control determining a subsequent change and through solely physical pressure communication with said applying means causing said power to effect said change.

85. In a -motor vehicle having the combination of a multiple driving relation change mechanism for positive ratios and neutral driving relations,. of power energized means to effect a plurality of changes in said mechanism and of immediate means to' apply said power actuation, a combined change determining and change effecting control means constructed and positioned for different foot control to effect different changes, and solely physical pressure connections communicating such determined effecting control with said mechanism, power and applying means combination.

86. In a motor vehicle having in combination a variable driving relation change mechanism for positive ratios and neutral driving relations, fluid power energized means to effect a relation change in said mechanism and means effectively applying said power, change determining means positioned and constructed for foot control and having a plurality of functionally distinct optionally operable foot pressable areas for subsequent change determination, said determination being transmitted to said power means, mechanism and applying means combination solely through physical pressure communication connections.

87. In a motor vehicle, a clutch, a driving relation change mechanism, fluid power energized means operating said mechanism for a plurality of changes, change effecting control means constructed and positioned for foot operation having a plurality of functionally distinct foot pressable areas for a plurality of changes, means associating said control means with said power means and mechanism combination whereby the pressure of the foot on a selected area self-sufficiently controls said combination for a complete selected change from one driving relation to another, and means preventing more than one change determination becoming effective at a time.

88. In an automobile, a clutch, a multiple driving relationchange device, power energized means effecting a change in said device, a purely mechanical subsequent change determining mechanism mechanically associated with said device and power means combination, and a single controller constructed and positioned for foot operation and self-sufficiently controlling said device power means and mechanism combination for a complete desired change from one relation to another.

89. In a motor vehicle, a driving ratio change mechanism having at least a duality of reciprocally movable driving relation elements for a plurality of driving ratio connections and dis-' connections, power means moving said duality of elements through the agency of common means giving a single path of such power communication and interchangeably connectible to either of said elements, and driver-operated change effecting control means for a plurality of changes positioned and constructed for different foot control to effect a different relation change in said mechanism.

90. A ratio change mechanism located substantially beneath the driving compartment flooring of an automobile, fluid power actuated means effecting a driving relation change in said mechanism, foot operable change determining means, an additional remote driver-energized actuator mounted normally accessible to the driver to actuate a relation change, and further mechanical actuation communicating means connecting said BERNARD H. MOSSINGHOFF. 

